Hydrogen Generation
Introduction
Historically, hydrogen has been indispensable for transforming petroleum
into many of the synthetic materials used in industrial production, such as
plastics, polymers, chemicals, and pharmaceutical raw materials. Hydrogen is
also needed to make fertilizer for agricultural purposes and may other
industrial applications. Currently, hydrogen is receiving a lot of press in
the context of new applications involving renewable energy and clean
technologies. In particular, R&D is underway to generate high rates of
low-cost hydrogen gas via electrolysis (splitting water molecules with
electrical energy to generate hydrogen) to fuel hybrid electric/hydrogen and
fuel cell vehicles and reduce NOx emissions in standard combustion engines.
Industry estimates that the total market for traditional uses of Hydrogen
combined with these new applications will reach $15.6 billion by 2016.
Challenge
Hydrogen-powered transportation may reduce environmental emissions, but most
hydrogen is currently generated from nonrenewable fossil fuels, such as
natural gas. In fact, 85% of the world’s hydrogen is produced by steam
reformation. In this process, natural gas is converted to hydrogen.
Unfortunately, a significant amount of greenhouse gasses are also produced,
most notably carbon monoxide (CO) and carbon dioxide (CO2); for every one
pound of hydrogen produced by the steam reformation process, four pounds of
greenhouse gases are released into the atmosphere --resulting in “dirty
hydrogen.” This dirty gas is unacceptable for use in many industrial and
renewable energy applications, such as fuel cells, without further
purification.
Alternative hydrogen production methods are essential for eliminating
production of these greenhouse gasses. Electrolysis can generate clean
hydrogen without the use of fossil fuels and has the potential to meet both
today’s hydrogen needs and those of the future. However, the technology has
not achieved the efficiency and cost levels required because the precious
metal catalyst materials used in the electrodes for electrolysis today are
expensive and the reaction that produces the hydrogen is not efficient
enough. Alternative low-cost catalyst materials must be found to increase
efficiencies and gas output.
Solution
Two types of electrolysis have been considered for hydrogen generation,
acidic and alkaline. Acidic electrolysis is ill suited to be the standard
production method as it requires prohibitively expensive platinum as its
catalyst material. Alkaline electrolysis is the more promising approach
because it eliminates the need for expensive precious metals to serve as a
catalyst, and with high surface area nano-scale particles, the catalytic
reaction is more efficient. For alkaline electrolysis, nickel is ideal
because it is far less costly than platinum and can easily be produced at
the nano scale. Nano scale nickel also dramatically increases the surface
area available for the catalytic reaction that generates the hydrogen, thus
increasing efficiency and production rates.
To address the hydrogen generation conundrum, QuantumSphere has not only
developed unique, low-cost, nanomaterials needed to increase catalytic
surface area on the electrodes, but has also developed a novel method for
directly producing hydrogen from water and electricity (using nano-enabled
electrodes) resulting in higher efficiencies and greater gas output. This
highly efficient system is delivered in a compact portable device designed
for on-board /on-demand low-cost, high-rate hydrogen production. Even with
the hydrogen transportation industry potentially years away, this new
electrolysis method could make other processes that use hydrogen, such as
fertilizer production, less dependent on fossil fuels.
QSI has demonstrated that by using a blend of its nickel and other nano
catalysts materials it is possible to exceed the Department of Energy’s
target with 85% efficiency while achieving a ten-fold increase in production
over all published data seen to date, and without any CO2. This degree of
efficiency now makes hydrogen generation through electrolysis more
economical and commercially viable for replacing fossil fuel-based methods.
Additionally, QSI’s proprietary and scalable manufacturing process can
produce high surface area nano catalyst materials in the quantities required
for large-scale commercial hydrogen generation via water electrolysis. QSI’s
nano scale materials thus make it possible to meet all current and future
hydrogen needs: for industrial production, as sole fuel for next generation
plug-in hybrid electric/hydrogen and fuel cell powered vehicles, and for the
hydrogen-enhanced standard combustion engine for emissions reduction
purposes.
Hydrogen Generation by Water Electrolysis
During electrolysis, water molecules are broken into their constituent parts
using QSI nanometal (such as Nano Ni) electrodes to produce oxygen (O2) and
hydrogen (H2). The hydrogen can be used to power fuel cells (See How
Hydrogen Creates Electric Power In A Fuel Cell); the oxygen can be stored or
vented as desired. In this diagram, the electrolysis process is powered by
solar panels made using Nano Ni, but conventional sources of electricity may
also be used.
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